Effect of Frontal Transcranial Direct Current Stimulation on BDNF in Stroke Patients With Cognitive Impairment

Inclusion Criteria: * (1)Stroke patients with CT or MRI imaging evidence, among which ischemic stroke met the diagnostic criteria of Chinese Guidelines for the Diagnosis and Treatment of Acute Ischemic Stroke 2018, and cerebral hemorrhage diseases met the diagnostic criteria of Chinese Guidelines for the Diagnosis and Treatment of Cerebral hemorrhage 2019; (2) There are symptoms related to cognitive dysfunction; Cognitive dysfunction was assessed by rehabilitation physicians. According to the MoCA evaluation standard,MoCA score ≤26 points; according to the MMSE evaluation standard, illiteracy score ≤17 points; primary school education level ≤20 points; secondary school education (including secondary school) level ≤22 points; college education (including junior college) level ≤23 points; (3)Age range 40-80 years old; (4) no obvious aphasia, speech expression and attention can cooperate with the completion of evaluation and treatment; (5)The patient or the patient's family members read and agree to sign the informed consent. Exclusion Criteria: * (1) Patients with severe diseases, such as malignant arrhythmia, acute myocardial infarction and acute heart failure, who cannot tolerate rehabilitation treatment; (2) Patients with untreated intracranial aneurysms, severe epilepsy, and intracranial metals who cannot receive tDCS treatment; (3) Non-PSCI patients with cognitive impairment, including patients with cognitive impairment left over from previous stroke and other organ disorders.